Sultan Sel, Burak Emre Altınordu, VESTEL, the project leader of the displayed project Customizable All-in-One PC by Sultan Sel, Burak Emre Altınordu, VESTEL explicates, Mass customization does not fit easily as a model within consumer electronics. Four target user groups are defined for customization concept: 1.travel agency-bank-secretary use, 2.office use, 3.home use, 4.retail use. These groups are defined with marketing research on the product. A comprehensive user needs research study is conducted for defining differing and customizable needs of each user group. As a result three main customization items are defined and used for differentiating the product for these user groups: 1.screen sharing 2.screen height adjustment 3.keyboard-calculator combination.